This gold post-war medal includes engravings of "Chicago Mercantile Battery" and key battles in which the company fought. It is one of the few extant Civil War items known to be associated with Chicago's Battery Boys. Two crossed cannon are located in the center of the badge.

At the top of the medal, where the eyehook is, the Battle of Arkansas Post is listed. It is followed, clockwise, by other actions that the Mercantile Battery participated in during the 1863 Vicksburg Campaign: Port Gibson, Champion Hill, Big Black River Bridge, May 22nd assault on Vicksburg (for which Captain Pat White and five of his men later received the Medal of Honor), Siege of Vicksburg, and Siege of Jackson (a.k.a. the Battle of Second Jackson).

The final battle engraved on this Chicago Mercantile Battery medal is the Battle of Mansfield, which was fought on April 8, 1864, in northwestern Louisiana, and was the worst Union defeat during General Nathaniel P. Banks' disastrous Red River Campaign. The Confederates named the battle after the nearby town of Mansfield, while the Federals referred to it as Sabine Crossroads.